[H] Power Managing LCDs

[Winterlight]

Back in the days of big glass CRTs the best energy policy, for the 
best image and life of a monitor was no policy at all. It took 30 
minutes of power to bring the image to full quality and letting it 
power down just repeated this process. The rule was to turn your 
monitor on in the morning and leave it on until you were ready to 
shut it down for the day.

What is the rule with LCDs flat panels. Is it better to let them run 
all day, power down and start up through out the day... what is the 
best policy?